My research interests include morphology, (micro-)comparative syntax, the interaction between syntax and morphophonology, argument structure, the morphosyntax and semantics of possession, Quechua morphology and syntax, and English dialect syntax. Fieldwork plays an important role in my investigations of all these things.

Officially, my job is to be BU's resident morphologist, but I take the position that morphology cannot be understood except in terms of how it fits into the architecture of the grammar as a whole. I believe the most fruitful approach to this question is one in which syntax generates all complex expressions- both "words" and "phrases"- and morphophonology interprets the output of the syntactic component. This is the position taken by Distributed Morphology, the theory assumed in most of my work so far.